2.5-layer structure light weight waterproof fabric

Abstract

The utility model discloses a 2.5 layer structure lightweight waterproof fabric, including the weaving fabric layer and waterproof membrane layer, the weaving fabric layer and waterproof membrane layer between adopt point glue joint, and the weaving of weaving fabric layer is the organization and is square structure, and the size of square is 1mm*1mm, and the frame fabric thickness of square is greater than the fabric thickness in square, waterproof membrane layer is adhered in the outer layer of weaving fabric layer through the point glue of array type arrangement, and the surface processing of waterproof membrane layer has a layer of concave-convex printing, and the shape of printing is 1mm*1mm square, and waterproof membrane layer is adhered on weaving fabric layer, and the square printing on waterproof membrane layer surface and the square frame on weaving fabric layer correspond one to one, and concave-convex cooperation, the utility model discloses fabric is more suitable for the outdoor scene use under non-extreme environment, can reach the balance between practicality and production cost, promotes the performance price ratio of fabric, can cover broader market.

Description

Technical Field

[0001] This utility model belongs to the field of textile fabric technology, and in particular relates to a lightweight waterproof fabric with a 2.5-layer structure. Background Technology

[0002] In recent years, outdoor sportswear has become increasingly popular among consumers. The scenarios for outdoor sports are expanding, with professional outdoor activities extending into urban leisure areas such as running and fishing. With the increasing variety of outdoor activities, the demand for more sophisticated fabrics with enhanced functionality is growing, requiring features such as waterproofing, windproofing, breathability, moisture permeability, lightweighting, and abrasion resistance. Domestic and international brands are actively developing these products to meet the needs of consumers. Two representative fabrics are PERTEX and GORE-TEX. PERTEX's core advantage lies in its special ultra-fine nylon fibers and high-count, high-density weaving technology, resulting in ultra-lightweight, soft, breathable, and windproof properties. However, it has relatively weak abrasion resistance and is not inherently waterproof. GORE-TEX's core advantage is its use of expanded polytetrafluoroethylene (ePTFE) film, which contains 9 billion micropores per square inch. These micropores are 20,000 times smaller than water droplets but 700 times larger than water vapor molecules. GORE-TEX is primarily used in professional protective clothing and equipment, providing comprehensive waterproof protection. However, its traditional three-layer seam construction makes the fabric somewhat stiff, affecting flexibility and comfort. Furthermore, the two types of fabrics mentioned above are very expensive and are currently only used by some high-end brands. In everyday applications, there is a lack of urban leisure outdoor fabrics that are reasonably priced, have comprehensive protective functions, and can meet the needs of multiple sports scenarios. Therefore, it is necessary to develop outdoor fabrics that meet the above requirements. Utility Model Content

[0003] To address the aforementioned problems and technical needs, this utility model provides a lightweight waterproof fabric with a 2.5-layer structure. The fabric adopts a 2.5-layer structure, which is more suitable for outdoor use in non-extreme environments. It can achieve a balance between practicality and production cost, improve the cost-effectiveness of the fabric, and cover a wider market.

[0004] The technical solution of this utility model is as follows: A 2.5-layer lightweight waterproof fabric includes a woven fabric layer and a waterproof membrane layer. The woven fabric layer and the waterproof membrane layer are bonded together by dot adhesive. The woven fabric layer has a grid structure, with each grid measuring 1mm*1mm. The fabric thickness of the grid border is greater than the fabric thickness inside the grid. The waterproof membrane layer is bonded to the outer layer of the woven fabric layer by an array of dot adhesives. The surface of the waterproof membrane layer is processed with a raised and recessed print, with the print shape being a 1mm*1mm square. The waterproof membrane layer is bonded to the woven fabric layer, and the square print on the surface of the waterproof membrane layer corresponds one-to-one with the grid border on the woven fabric layer, creating a concave-convex fit. The fabric is composed of a waterproof membrane layer and a woven fabric layer. The waterproof membrane layer provides waterproofing. The woven fabric layer uses a grid weave, with the grid border being thicker than the fabric inside the grid, providing a lightweight feel. The grid border also provides strength to the fabric and reduces the impact of the grid border on abrasion resistance.

[0005] Furthermore, the waterproof membrane layer is a transparent PU membrane layer with a thickness of 13μm and a weight of 12g / ㎡. The transparent PU membrane layer allows the weave of the inner fabric to show through, enhancing the visual texture without affecting the color and texture of the fabric, while the waterproof and moisture-proof properties of the membrane itself meet the functional requirements of the composite fabric.

[0006] Furthermore, the fiber composition of the woven fabric layer is nylon, the border fabric of the square is woven from double-strand nylon yarn, and the fabric inside the square is woven from single-strand nylon yarn.

[0007] Furthermore, the total yarn density of the woven fabric layer is 520 T / inch, and the weight of the woven fabric layer is 22 g / m².

[0008] High-density yarns provide good strength, and the checkered border fabric effectively improves the overall abrasion resistance of the fabric, giving it the characteristics of being lightweight, abrasion-resistant, and high-strength.

[0009] Furthermore, the array of adhesive dots consists of circular dots with a diameter of 0.48 mm and a height of 0.03 mm. The coverage of the circular dots on the waterproof membrane layer is 34%, and the mesh count of the circular dots is 1200 per square inch.

[0010] Furthermore, the adhesive used is a hot melt adhesive, and the amount of adhesive used on the waterproof membrane layer is 3g / ㎡.

[0011] The beneficial effects of this utility model are: 1) This composite fabric uses a 2.5-layer structure instead of the traditional three-layer adhesive structure, and uses spot bonding instead of full-body adhesive bonding, which reduces the amount of glue used and effectively reduces the weight and cost of the composite fabric. Since the spot bonding covers only 34%, the inner woven fabric and the outer PU waterproof membrane can maintain their original feel and will not become too stiff due to the glue bonding. The composite fabric as a whole has a soft feel, which can improve the comfort and flexibility of wearing, and is suitable for use in a variety of outdoor scenarios. 2) In the design of the woven fabric layer, a checkered pattern is used to balance the lightness and abrasion resistance of the fabric. This creates a checkered pattern on the fabric surface. When the fabric comes into contact with the outside, the raised checkered edges rub against each other. Due to the greater thickness, the raised edges are more abrasion resistant, protecting the thinner fabric inside the frame and improving the overall abrasion resistance of the fabric while maintaining a light and soft feel. At the same time, to improve the adhesion between the fabric and the waterproof membrane layer, square prints are set on the waterproof membrane layer. The prints and checkered edges complement each other, improving the bonding between the two layers of fabric. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the layered structure of a 2.5-layer lightweight waterproof fabric according to this utility model. The markings in the diagram are: woven fabric layer 1, checkered border 11, waterproof membrane layer 2, and square print 12. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] like Figure 1 The illustration shows a 2.5-layer lightweight waterproof fabric of this invention, comprising a woven fabric layer 1 and a waterproof membrane layer 2. The woven fabric layer 1 and the waterproof membrane layer 2 are bonded together by adhesive dots. The woven fabric layer 1 has a square grid structure, with each square measuring 1mm*1mm. The fabric thickness of the grid border 11 is greater than the fabric thickness inside the square. The waterproof membrane layer 2 is bonded to the outer layer of the woven fabric layer by an array of adhesive dots. The surface of the waterproof membrane layer is processed with a raised and recessed print, with the print being a 1mm*1mm square. The square print 12 on the surface of the waterproof membrane layer 2 corresponds one-to-one with the grid border 11 on the woven fabric layer 1, creating a concave-convex fit.

[0015] The woven fabric layer 1 is composed of nylon fibers. The border fabric of the squares is woven from double-strand nylon yarn, while the fabric within the squares is woven from single-strand nylon yarn. The total yarn density of the woven fabric layer is 520 T / inch, and the weight of the woven fabric layer is 22 g / m².

[0016] High-density yarns provide good strength, and the checkered border fabric effectively improves the overall abrasion resistance of the fabric, giving it the characteristics of being lightweight, abrasion-resistant, and high-strength.

[0017] The adhesive used is a hot melt adhesive, and the application rate on the waterproof membrane is 3 g / ㎡. The adhesive dots arranged in an array are circular dots with a diameter of 0.48 mm and a height of 0.03 mm. The coverage of the waterproof membrane is 34%, and the mesh size is 1200 dots / square inch. (Not shown in the dispensing diagram) The waterproof membrane layer 2 is a transparent PU membrane layer with a thickness of 13μm and a weight of 12g / ㎡. The transparent PU membrane layer allows the weave of the inner fabric to show through, enhancing the visual texture without affecting the color and texture of the fabric. Meanwhile, the waterproof and moisture-proof properties of the membrane itself meet the functional requirements of the composite fabric.

[0018] The manufacturing process of this utility model's 2.5-layer lightweight waterproof fabric: Step 1: Relaxation and desizing. The purpose is to remove various oils and sizing agents added during the weaving process. The main process conditions are as follows: caustic soda 10-20 g / L, surfactant 2-3 g / L, chelating dispersant 0.2-0.5 g / L, continuous heat treatment at 95-98℃ for 200-300 seconds, followed by a continuous water bath at 50-70℃ for thorough washing. Throughout the scouring process, the fabric is pulled by multiple rollers and moves horizontally with minimal tension in the direction of travel, allowing for full and natural stretching. After high-temperature dyeing, this results in good dimensional stability. The longer desizing time ensures thorough desizing of the double-layered fabric, achieving excellent dyeing results. After desizing, the fabric can be dyed directly while wet without drying and setting, reducing costs and improving efficiency.

[0019] Step 2: Dyeing process: Use overflow dyeing method and keep warm at 95℃ for 40 minutes.

[0020] Step 3: Wet setting: 170℃, 1 minute, to ensure the fabric is fully dried.

[0021] Step 4: Impregnation and drying: Temperature 140℃-150℃-160℃-160℃, 165℃-165℃-165℃-165℃, fabric speed 30-50m / min; Waterproofing agent formula: fluorine-free waterproofing agent 40-60g / l, softener 5-20g / l, accelerator 10-20g / l, antistatic agent 0.5-20g / l, citric acid 0.4-1.0g / l, adjust pH value to 4-5, impregnation roller pressure 0.2-0.5Mpa, pressure absorption rate 30%-80%.

[0022] Step 5: Using hot melt adhesive, the fabric part and the film part are bonded together to form a 2.5-layer fabric structure.

[0023] The processing steps for Step 5 bonding are as follows: The main bonding process is as follows: First, the heated and melted hot melt adhesive is transferred to the PU printed film through a special engraving roller. Then, the PU printed film and the fabric are bonded together under the pressure of the bonding roller to form a 2.5-layer structure fabric (A). The hot melt adhesive is solid at room temperature, and its melting temperature is 90-105℃. If the temperature is too high, the viscosity of the hot melt adhesive is too low, resulting in poor adhesion. If the temperature is too low, the viscosity of the hot melt adhesive is too high, resulting in poor penetration and adhesion. The preferred heating temperature is 100℃. The engraving roller is a 160cm long, 30cm diameter stainless steel roller with small dots of the same size and depth engraved on its surface. The coverage is 34%, the diameter is 0.48mm, the depth is 0.03mm, and the mesh count is 1200 / square inch.

[0024] Curing: The 2.5-layer structural fabric (A) after lamination 1 is placed in a curing chamber and cured for 48 hours. The curing chamber temperature is 25-40℃, and the relative humidity is 45%-65%. Under suitable temperature and humidity conditions, the hot melt adhesive can achieve good adhesion to the fabric and film. Preferably, the curing chamber temperature is 35℃ and the relative humidity is 55%.

[0025] The above descriptions are merely several preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations and substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A lightweight waterproof fabric with a 2.5-layer structure, characterized in that: It consists of a woven fabric layer and a waterproof membrane layer, which are bonded together by dot adhesive. The woven fabric layer has a grid structure, with each grid measuring 1mm x 1mm. The fabric thickness of the grid border is greater than that of the fabric inside the grid. The waterproof membrane layer is bonded to the outer layer of the woven fabric layer by an array of dot adhesives. The surface of the waterproof membrane layer is processed with a raised and recessed print, with the print being a 1mm x 1mm square. The square print on the surface of the waterproof membrane layer corresponds one-to-one with the grid border on the woven fabric layer, creating a convex and concave fit.

2. The lightweight waterproof fabric with a 2.5-layer structure according to claim 1, characterized in that: The waterproof membrane is a transparent PU membrane with a thickness of 13μm and a basis weight of 12g / ㎡.

3. The lightweight waterproof fabric with a 2.5-layer structure according to claim 1, characterized in that: The woven fabric layer is made of nylon, the border fabric of the squares is woven from double-strand nylon yarn, and the fabric inside the squares is woven from single-strand nylon yarn.

4. The lightweight waterproof fabric with a 2.5-layer structure according to claim 3, characterized in that: The total yarn density of the woven fabric layer is 520 T / inch, and the weight of the woven fabric layer is 22 g / m².

5. The lightweight waterproof fabric with a 2.5-layer structure according to claim 1, characterized in that: The array of adhesive dots consists of circular dots with a diameter of 0.48 mm and a height of 0.03 mm. The coverage of the circular dots on the waterproof membrane is 34%, and the mesh count of the circular dots is 1200 per square inch.

6. The lightweight waterproof fabric with a 2.5-layer structure according to claim 5, characterized in that: The adhesive used is a hot melt adhesive, and the amount of adhesive applied to the waterproof membrane layer is 3g / ㎡.

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